﻿// The MIT License (MIT)
// 
// Copyright (c) 2015-2018 Rasmus Mikkelsen
// Copyright (c) 2015-2018 eBay Software Foundation
// https://github.com/eventflow/EventFlow
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;
using System.Threading;
using System.Threading.Tasks;
using EventFlow.Configuration;

namespace EventFlow.Extensions
{
    public static class EventFlowOptionsBootstrapExtensions
    {
        public static IEventFlowOptions RunOnStartup<TBootstrap>(this IEventFlowOptions eventFlowOptions) 
            where TBootstrap : class, IBootstrap
        {
            return eventFlowOptions
                .RegisterServices(sr => sr.Register<IBootstrap, TBootstrap>());
        }

        public static IEventFlowOptions RunOnStartup(this IEventFlowOptions eventFlowOptions, IBootstrap bootstrap) 
        {
            return eventFlowOptions
                .RegisterServices(sr => sr.Register(_ => bootstrap));
        }

        public static IEventFlowOptions RunOnStartup(this IEventFlowOptions eventFlowOptions, Func<CancellationToken, Task> startupAction)
        {
            return eventFlowOptions
                .RunOnStartup(new ActionBootstrap(startupAction));
        }

        public static IEventFlowOptions RunOnStartup(this IEventFlowOptions eventFlowOptions, Action startupAction)
        {
            return eventFlowOptions
                .RunOnStartup(_ => 
                { 
                    startupAction();
                    return Task.FromResult(true);
                });
        }

        private class ActionBootstrap : IBootstrap
        {
            private readonly Func<CancellationToken, Task> _action;

            public ActionBootstrap(Func<CancellationToken, Task> action)
            {
                _action = action;
            }

            public async Task BootAsync(CancellationToken cancellationToken)
            {
                await _action(cancellationToken).ConfigureAwait(false);
            }
        }
    }
}